{
  "id": 14749615,
  "title": "Meta releases Muse Spark Open, saying it is the most capable US open-weight model, with 816B total and 42B active parameters and a 1M-token context window (Meta AI Research)",
  "url": "https://urgent.news/2026/10/15/meta-releases-muse-spark-open-saying-it-is-the-most-capable-us-open",
  "topic": "ai",
  "section": "AI",
  "published": "2026-10-15T17:10:01.000Z",
  "source": {
    "name": "Techmeme",
    "slug": "techmeme",
    "url": "https://research.meta.ai/blog/muse-spark-open"
  },
  "original_language": "en",
  "account": "Meta has unveiled Muse Spark Open, a cutting-edge US open-weight model boasting 816B total parameters and a substantial 42B active parameters, complemented by an expansive 1M-token context window. This model, designed with agentic capabilities, marks a significant leap in performance and is now available for download on leading platforms such as Amazon SageMaker AI, Google Cloud Model Garden, Hugging Face, and Microsoft Foundry Models.\n\nTailored for coding and complex tasks requiring multi-step reasoning, Muse Spark Open runs seamlessly on desktops using Apple M5 Ultra Mac Studios equipped with the latest MLX framework. The model's impressive specifications, including the utilization of two Mac Studios, provide users with a terabyte of unified memory, enabling operations akin to a supercomputer on a single desktop. This configuration allows Muse Spark Open to process information at unprecedented speeds, with optimizations for various silicon architectures, including AMD, Apple, Intel, and NVIDIA.\n\nDevelopers can further tailor the model using the PyTorch framework, enhancing its functionality to suit specific needs. Meta's commitment to accessibility and safety is evident in the model's release under the Muse Model License, which permits free use for many developers and includes additional safety post-training measures. Extensive evaluations confirm that Muse Spark Open adheres to stringent safety standards across multiple risk categories, with detailed results available in the model card and a forthcoming evaluation report.\n\nThe model's performance has been demonstrated through real-world applications, including automated updates to open-source software and advanced video editing tasks. These demonstrations underscore the model's versatility and its potential to transform how users interact with technology on a personal level. To access Muse Spark Open and explore its capabilities, visit the Hugging Face collection at https://huggingface.co/collections/meta-models/muse-spark-open.",
  "summary": "Muse Spark Open is available today and brings leading agentic capabilities to your desktop for the first time on Apple M5 Ultra Mac Studios.",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 8,
    "also_reported_by": [
      {
        "outlet": "Hugging Face",
        "title": "Welcome Muse Spark Open: open-weight frontier multimodal mixture-of-experts model from Meta",
        "url": "https://urgent.news/2026/10/15/welcome-muse-spark-open-open-weight-frontier-multimodal-mixture-of",
        "published": "2026-10-15T00:00:00.000Z"
      },
      {
        "outlet": "CNBC",
        "title": "Apple and Meta team up to make Muse AI model run on Mac computers",
        "url": "https://urgent.news/2026/10/15/apple-and-meta-team-up-to-make-muse-ai-model-run-on-mac-computers-14744381",
        "published": "2026-10-15T17:00:01.000Z"
      },
      {
        "outlet": "AWS Machine Learning",
        "title": "Meta’s Muse Spark Open now available in Amazon SageMaker JumpStart",
        "url": "https://urgent.news/2026/10/15/metas-muse-spark-open-now-available-in-amazon-sagemaker-jumpstart",
        "published": "2026-10-15T17:43:35.000Z"
      },
      {
        "outlet": "MacRumors",
        "title": "Meta and Apple Bring Muse Spark Open AI Model to Mac Studio",
        "url": "https://urgent.news/2026/10/15/meta-and-apple-bring-muse-spark-open-ai-model-to-mac-studio",
        "published": "2026-10-15T17:47:29.000Z"
      },
      {
        "outlet": "The Verge",
        "title": "Meta and Apple team up to make Muse AI models run better on Macs",
        "url": "https://urgent.news/2026/10/15/meta-and-apple-team-up-to-make-muse-ai-models-run-better-on-macs",
        "published": "2026-10-15T18:15:36.000Z"
      },
      {
        "outlet": "Slashdot",
        "title": "Meta and Apple Bring Muse Spark Open AI Model to Mac Studio",
        "url": "https://urgent.news/2026/10/15/meta-and-apple-bring-muse-spark-open-ai-model-to-mac-studio-14770713",
        "published": "2026-10-15T19:00:00.000Z"
      },
      {
        "outlet": "Punch Nigeria",
        "title": "Meta unveils new AI model Muse Spark Open",
        "url": "https://urgent.news/2026/10/15/meta-unveils-new-ai-model-muse-spark-open",
        "published": "2026-10-15T21:08:54.000Z"
      }
    ]
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}